AIDS-097253 AIDS097253 [S-[1R*,2S*(2S*,3R*)]-N-[3-[[3-[[(1,1-Dimethylethoxy)carbonyl]amino]-2-hydroxy-4-phenylbutyl]amino-2-hydroxy-1-(phenylmethyl)-propyl]-N,N-[(1,1-dimethylethoxy)carbonyl]-L-valinamide